Define chthonic. chthonic synonyms, chthonic pronunciation, chthonic translation, English dictionary definition of chthonic. also chtho·ni·an adj. Greek Mythology Of or relating to the underworld. American Heritage® Dictionary of the English Languag
Define autochthonic. autochthonic synonyms, autochthonic pronunciation, autochthonic translation, English dictionary definition of autochthonic. also au·toch·tho·nal or au·toch·thon·ic adj. 1. Originating or formed in the place where found; indigen